Adjustable Iris Aperture Diaphragm UV Filter KIT M30 to M37

In this review of the Adjustable Iris Aperture Diaphragm UV Filter KIT, the bottom line is simple: this small adapter kit is for photographers and optics technicians who need precise, mechanical control over aperture size when working with night vision or custom lens setups. The kit combines an adjustable iris module with a 37mm UV lens and the M30 to M37 adapter range, so it is especially useful for projects that require a compact, reliable way to vary aperture from very small to nearly full diameter. It is presented as a rugged, aviation metal component built for repeatable adjustments.

Key Features

• Adjustable iris aperture: Provides a continuous aperture range from 1.5mm to 26mm so users can fine tune light throughput for exposure or depth of field control.
• M30 to M37 compatibility: The adapter covers common small thread sizes, making it straightforward to mount between M30 and M37 lenses or accessories without custom machining.
• Aviation metal construction: Built from rugged materials that resist wear and hold calibration during routine field or bench use.
• Simple operation: The manual handle lets users change the diaphragm diameter quickly and directly, which is useful for live adjustment while testing optics.
• Includes 37mm UV lens: The kit adds a UV lens element for basic ultraviolet filtration and to match 37mm thread systems in a compact package.

Who It's For

The kit is aimed at photographers, optics hobbyists and technicians who work with night vision gear such as PVS-14 or PVS-31, reverse-mounted lenses, or custom optical rigs where variable physical apertures are needed. It is also suitable for experimental setups that require a small, mechanically adjustable diaphragm rather than electronic aperture control.

Users who need autofocus integration, electronic iris control, or factory-calibrated lens assemblies should look elsewhere; this is a mechanical adapter that requires manual operation and basic familiarity with lens threads and mounting. It is not a drop-in replacement for modern camera lenses expecting electronic communication.

Pros & Cons

Pros

• Solid metal construction offers durability and reliable performance under repeated adjustments.
• Wide aperture range from 1.5mm to 26mm covers precise low-light stops and near-full openings for varied optical tests.
• Simple handle control makes realtime manual adjustments fast and intuitive during field use.
• Includes a 37mm UV lens to integrate easily with 37mm-thread components.

Cons

• Manual mechanism means no electronic control or remote adjustment is possible.
• Designed for small metric threads (M30 to M37) and specific gear like PVS devices, so it is not a universal lens replacement for standard camera systems.

Specifications

Our Verdict

The Adjustable Iris Aperture Diaphragm KIT is a practical, well made accessory for anyone building or modifying optical assemblies who needs a compact, manual aperture solution. Its rugged metal build, wide iris range and included 37mm UV lens give good value for workshop and field use, but those needing electronic control or broad camera compatibility should consider alternate solutions.

Frequently Asked Questions

Will this fit my PVS-14?
Yes, the diaphragm is described for use with PVS-14 and similar night vision devices, provided the thread sizes match M30 to M37 interfaces.

Can the iris be controlled remotely?
No, the aperture is adjusted manually with the handle; there is no electronic or remote control function.

What does the kit include?
The kit pairs the dimming aperture module with a 37mm UV lens and an adapter range for M30 to M37 mounting.